1 October 2007 Discrete-cosine-transform–domain downsizing with windowing operation
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J. of Electronic Imaging, 16(4), 040501 (2007). doi:10.1117/1.2818176
Abstract
A simple and effective method is presented for discrete-cosine-transform (DCT)–domain downsizing. Various methods employed in DCT-domain downsizing simply reuse the frequency component of DCT, which shows a severe aliasing effect. The proposed approach extends the downsizing method for alleviating or reducing the aliasing effect with a windowing operation, which adjusts the magnitude of the DCT coefficient. Visual inspection showed satisfactory results, with no complexity overhead and performance degradation regarding the peak-signal-to noise ratio (PSNR) after upsampling.
Il-Hong Shin, Jung Ju Yoo, Jin Woo Hung, "Discrete-cosine-transform–domain downsizing with windowing operation," Journal of Electronic Imaging 16(4), 040501 (1 October 2007). http://dx.doi.org/10.1117/1.2818176
Submission: Received ; Accepted
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KEYWORDS
Visualization

Image filtering

Optical inspection

Nonlinear filtering

Phase shifts

Video

Image processing

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